I will try to answer all of these questions… first it is a 3.5 tried to get to the bulletin above but cant? How did you get to it maybe I am doing something wrong there… Dont have a vaccuum gauge but did pull the o2 sensor and no change in it… we did take the mass air flow sensor off and it idles and when we put it back in the van immediately died. finally the computer code when i looked it up said " High Intake Air Temp" which is why I was thinking this sensor… Keep giving me answers I will keep trying…I am just a backyard mechanic trying to help my sister with this one…